If the work done by (x-1) men in (x+1) days is to the work done by (x+2) men in (x-1) days are in th

Surit Datta   10 years AGO

According to the question
{ (x-1)(x+1) / (x-1)(x+2) }= 9/10
=> (x+1)/(x+2) = 9/10
=> x = 8
So option 5
That's it.

Like? Yes (13) | No (6)  

Akhil Malhotra   10 years AGO

(x-1)(x+1):(x+2)(x-1)=9:10
cross multiply them
10x^2-10=9x^2+9x-18
simplifying
x^2-9x+8=0
solving it, we get
(x+1)(x-8)=0
so the answer is 8 i.e. option 5

Like? Yes (10) | No (3)  

susanta   10 years AGO

(x-1)(x+1)/(x+2)(x-1)=9/10
x=8

Like? Yes (5) | No   

vaishnavi   10 years AGO

10(x-1)(x+1)=9(x+2)(x-1)
x=8

Like? Yes (5) | No   

Sundar Kumar   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8
Answer: Option 5) 8

Like? Yes (7) | No (3)  

anupriya sinha   10 years AGO

(x+1)(x-1) / (x+2)(x-1) = 9/10
=> x = 1 ,8

Like? Yes (5) | No (1)  

RAKESH   10 years AGO

(x-1)(x+1) / (x+2)(x-1) = 9/10
=> (x+1)/(x+2) = 9/10 [x not equal to 1]
=> x = 8

Like? Yes (4) | No (1)  

Rahul   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8

Like? Yes (4) | No (2)  

Shreya Banerjee   10 years AGO

8 is correct answer
sol:(x-1)(x+1)/(x+2)(x-1)=9/10
then from above eq:(x+1)/(x+2)=9/10
by observing eq:we can say that..

x=8

Option 5.

Like? Yes (4) | No (2)  

Mithun Kumar Kesari   10 years AGO

8

Like? Yes (2) | No   

A.Vignesh Guru   10 years AGO

9:10 = (x-1)(x+1) : (x+2)(x-1)
((x+1)/(x+2)) = 9/10
10x + 10 =9x + 18
x=8

Like? Yes (3) | No (1)  

JUHI RAI   10 years AGO

M1D1=M2D2
(x-1)(x+1)=(x+2)(x-1)
(x+1)/(x+2)=9/10
10x+10=9x+18
x=8

Like? Yes (2) | No   

THUMMALA VINEESHA   10 years AGO

[(x-1)(x+1)/(x+2)(x-1)]=[9/10]
x=1,8
x does not exists so, x=8

Like? Yes (3) | No (1)  

Suyash Kunawat    10 years AGO

(x-1)(x+1) = x^2-1
and (x+2)(x-1) = x^2+x-2
if their ratio is equal to 9/10 then the equation reduces to
(x^2-1)/(x^2+x-2) =9/10
on solving further we get
x^2-9x+8=0
x^2-8x-x+8=0
x(x-8)-1(x-8)=0
(x-8)(x-1)=0
so possible values of x are 8 and 1
so fropm the supplied options we have option no 5 i.e. 8 as the correct option

Like? Yes (3) | No (1)  

niraj   10 years AGO

x+1/x+2=9/10
10x+10=9x+18
8

Like? Yes (3) | No (1)  

pallavi kumbhar   10 years AGO

total work done by (x-1)= (x-1)(x+1)
total work done by (x+2)= (x+2)(x-1)
so,
[(x-1)(x+1)]/[(x+2)(x-1)]=9:10
by solving it we get
x=8

Like? Yes (2) | No   

shree   10 years AGO

x=8

Like? Yes (2) | No   

Ramesh Sriram   10 years AGO

(X-1)(x+1)/(x+2)(x-1)=9/10
Solving
X=8

Like? Yes (2) | No   

Jigyasa Kumar   10 years AGO

solving the eqn x = 8

Like? Yes (2) | No   

Moti Kumari   10 years AGO

10/9=((x-1)(x+1)) / ((x+2)(x-1) )
(x+1)/(x+2) =10/9
x=8

Like? Yes (2) | No   

vivek   10 years AGO

x=8

Like? Yes (2) | No   

A M ANKIT KALLURAYA   10 years AGO

x+1/x+2=9/10

Like? Yes (2) | No   

Jaspalsingh Parmar   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8

Like? Yes (3) | No (2)  

Supriya Mondal   10 years AGO

From the above question we can write,
((x-1)*(x+1))/((x+2)*(x-1))=9/10
so x=8
so option 5)8 is the right answer

Like? Yes (5) | No (4)  

sravani   10 years AGO

given
(x-1)(x+1) 9
__________ = ____
(x+2)(x-1) 10

we get
x^2 - 9x + 8=0
x=8 or 1
x can't be 1 as eq will become 0/0(undefined)
so x=8

Like? Yes (2) | No (1)  

llamar   10 years AGO

((x+1)(x-1))/((x+2)(x-1))=9/10
by solving above expression you will get the ans i.e. x=8

Like? Yes (3) | No (2)  

Abhishek Porwal   10 years AGO

=>(x-1)(x+1)/(x+2)(x-1) =9/10
=>10x + 10 = 9x + 18
=>x=8

Like? Yes (3) | No (2)  

madhusudhanreddy   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8 ANS

Like? Yes (1) | No   

Jay parmar   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8

Like? Yes (3) | No (2)  

lavanya   10 years AGO

x-2/x-1=9/10
10x-20=9x-9
x=11

Like? Yes (3) | No (2)  

MRITUNJAY   10 years AGO

X+1/x+2=9/10
x=8.

Like? Yes (3) | No (2)  

NITHYA   10 years AGO

by inverse variation ,

(x+1)*(x-1)/(x-1)*(x+2)=9/10

on solving we get x= 8

Like? Yes (2) | No (1)  

vikram   10 years AGO

(x-1)(x+1)/(x+2)(x-1)=9/10
on solving we get x = 8.

Like? Yes (3) | No (2)  

Ashwin Dinesh   10 years AGO

guessed

Like? Yes (1) | No   

Aarti Galar   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8

Like? Yes (1) | No   

Tark Patel   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8

Like? Yes (1) | No   

varun Galar   10 years AGO

man work in 1st case=(x-1)(x+1)
man work in 2nd case=(x+2)(x-1)
(x-1)(x+1)/(x+2)(x-1)=9/10
x+1/x+2=9/10
10x+10=9x+18
x=8

Like? Yes (1) | No   

Faisal JAffry   10 years AGO

(X-1) * (X +1) men can finish the work in 1 day
Similarly,
(X+2)(X-1) men can finish the work in 1 day
Therefore,
(X-1) * (X +1)/(X+2)(X-1)=9/10;
10(X+1)=9(X+2);
X=8;

Like? Yes (1) | No   

Md.Sultan Khichi   10 years AGO

(x-1)*(x+1)/(x-1)*(x+2)=9/10
so,9x+18=10x+10
hence x=8 ans
so. optn 5 is correct

Like? Yes (1) | No   

Devendra Marghade   10 years AGO

[(x-1)(x+1)] / [(x+2)(x-1)] =9/10
10(x^2+x-x-1) = 9(x^2-x+2x-2)
x^2-9x+8=0
(x-1)(x-8)=0, So x=8

Like? Yes (1) | No   

guru   10 years AGO

(x-1)(x+1) : (x+2)(x-1) = 9 : 10

x+1 : x+2 = 9:10
10x+10= 9x+18
x=8

Like? Yes (1) | No   

utkarsh bisht   10 years AGO

total work done by x-1 = (x-1)(x+1)
total work done by (x+2)= (x+2) (x-1)
as they are in ratio so, (x-1)(x+1)/(x+2) (x-1)=9/10
hence x=8

Like? Yes (1) | No   

PAWAN KUMAR   10 years AGO

(x+2)*(x-1)/(x+1)*(x-1) = 10/9
=> x+2/x+1 = 10/9
=> x=8. Ans.

Like? Yes (1) | No   

pappu kumar priye   10 years AGO

(x+1)*(x-1)/(x+2)*(x-1)=(x+2/(x-1)=9/10 so x=8

Like? Yes (1) | No   

abhishek   10 years AGO

(x-1)(x+1)/(x+2)(x-1)=9/10
x^2-9x+8=0
x=8

Like? Yes (1) | No   

Priya Dharshini   10 years AGO

(x-1)(x+1)/(x+2)(x-1)=9/10

==>(x+1)/(x+2)=9/10;
x=8 ans;

Like? Yes (1) | No   

payal vyas   10 years AGO

(x-1)(x+1)/(x+2)(x-1)=9/10
x^2-1/x^2+x-2=9/10

10x^2-10=9x^2+9x-18

x^2=9x-8

x^2-9x+8=0

x^2-8x-x+8=0

x(x-8)-1(x-8)=0
(x-8)(x-1)=0
x=8,1
if x=1
then equation (0-1)(0+1)/(0+2)(0-1)=9/10
so value of x=8 option(5)

Like? Yes (1) | No   

Banti   10 years AGO

((x-1)(x+1))/((x+2)(x-1))
x-1 will get cancel in numerator and denominator.then
(x+1)/(x+2) will be resultant. from the options substitute 8, answer will be 9:10 ratio.

Like? Yes (1) | No   

khushboo goenka   10 years AGO

x^2-1/x^2+x-2=10/9

Like? Yes (1) | No   

Sanu Panji   10 years AGO

(x-1)(x+1) : (x+2)(x-1) = 9 : 10
or, x= 8

Like? Yes (1) | No   

Dr.Dipin Singh   10 years AGO

[(x-1) * (x+1)] / [(x+2) * (x-1)] =9/10
solving, we get
x=8

Like? Yes (1) | No